G&M Oil Co., founded in 1969, has c-stores throughout Southern California, including in Orange County, Los Angeles, San Diego, Riverside, Ventura and San Bernardino counties. It operates Chevron ExtraMile c-stores, Chevron Food Marts and G&M Food Marts, offering a variety of prepared foods, grab-and-go snacks, convenience items, tobacco and beverages. The stores have become a popular food destination, with selections like hot dogs, taquitos and nachos.

Configurations range from small, 500-square-foot kiosk stores to 2,500-square-foot structures. Most stores are 1,200 to 2,500 square feet.

For benchmarking purposes, store counts are as of Jan. 1, 2021.

Headquarters:Huntington Beach, California
No. of Stores:178
Rank Last Year:42